Georgiou, S.; Koukouvinos, C.; Stylianou, S. Construction of new skew Hadamard matrices and their use in screening experiments. (English) Zbl 1429.62350 Comput. Stat. Data Anal. 45, No. 3, 423-429 (2004). MSC: 62K15 05B20 PDFBibTeX XMLCite \textit{S. Georgiou} et al., Comput. Stat. Data Anal. 45, No. 3, 423--429 (2004; Zbl 1429.62350) Full Text: DOI
Hong, Shaofang; Sun, Qi Determinants of matrices associated with incidence functions on posets. (English) Zbl 1080.11023 Czech. Math. J. 54, No. 2, 431-443 (2004). MSC: 15A15 15B57 06A07 06A12 11C20 PDFBibTeX XMLCite \textit{S. Hong} and \textit{Q. Sun}, Czech. Math. J. 54, No. 2, 431--443 (2004; Zbl 1080.11023) Full Text: DOI EuDML
Medyanik, A. I. Antipodal \(n\)-gons inscribed in a regular \((2n - 1)\)-gon and half-circulant Hadamard matrices of order \(4n\). (Russian. English summary) Zbl 1072.05015 Mat. Fiz. Anal. Geom. 11, No. 1, 45-66 (2004). Reviewer: V. A. Zinov’ev (MR2005b:05048) MSC: 05B20 15B57 PDFBibTeX XMLCite \textit{A. I. Medyanik}, Mat. Fiz. Anal. Geom. 11, No. 1, 45--66 (2004; Zbl 1072.05015)
Wu, Yan Normal form of skew-symmetric matrices and orders of pseudo-symplectic groups over \(\mathbb Z/2^k\mathbb Z\). (Chinese. English summary) Zbl 1069.05015 Acta Math. Sci., Ser. A, Chin. Ed. 24, No. 6, 772-785 (2004). MSC: 05B20 15B57 20G35 PDFBibTeX XMLCite \textit{Y. Wu}, Acta Math. Sci., Ser. A, Chin. Ed. 24, No. 6, 772--785 (2004; Zbl 1069.05015)
Hou, Jia; Lee, Moon Ho Cocyclic function on Jacket matrices. (English) Zbl 1063.65597 WSEAS Trans. Syst. 3, No. 8, 2727-2730 (2004). MSC: 65T50 15B57 05B20 PDFBibTeX XMLCite \textit{J. Hou} and \textit{M. H. Lee}, WSEAS Trans. Syst. 3, No. 8, 2727--2730 (2004; Zbl 1063.65597)
Kotsireas, Ilias S.; Koukouvinos, Christos Inequivalent Hadamard matrices with buckets. (English) Zbl 1162.05304 J. Discrete Math. Sci. Cryptography 7, No. 3, 307-317 (2004). MSC: 05B20 15B57 68Q25 68W30 PDFBibTeX XMLCite \textit{I. S. Kotsireas} and \textit{C. Koukouvinos}, J. Discrete Math. Sci. Cryptography 7, No. 3, 307--317 (2004; Zbl 1162.05304) Full Text: DOI
Fletcher, Roderick J.; Koukouvinos, Christos; Seberry, Jennifer New skew-Hadamard matrices of order \(4\cdot 59\) and new \(D\)-optimal designs of order \(2\cdot 59\). (English) Zbl 1054.62081 Discrete Math. 286, No. 3, 251-253 (2004). MSC: 62K05 05B20 PDFBibTeX XMLCite \textit{R. J. Fletcher} et al., Discrete Math. 286, No. 3, 251--253 (2004; Zbl 1054.62081) Full Text: DOI
Gramlich, Ralf Line-hyperline pairs of projective spaces and fundamental subgroups of linear groups. (English) Zbl 1046.51001 Adv. Geom. 4, No. 1, 83-103 (2004). Reviewer: Herbert Hotje (Hannover) MSC: 51A05 51D25 12E15 PDFBibTeX XMLCite \textit{R. Gramlich}, Adv. Geom. 4, No. 1, 83--103 (2004; Zbl 1046.51001) Full Text: DOI EuDML Link